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USN-2283-1: Linux kernel vulnerabilities

16 July 2014

Several security issues were fixed in the kernel.




Sasha Levin reported a flaw in the Linux kernel's point-to-point protocol
(PPP) when used with the Layer Two Tunneling Protocol (L2TP). A local user
could exploit this flaw to gain administrative privileges. (CVE-2014-4943)

Michael S. Tsirkin discovered an information leak in the Linux kernel's
segmentation of skbs when using the zerocopy feature of vhost-net. A local
attacker could exploit this flaw to gain potentially sensitive information
from kernel memory. (CVE-2014-0131)

Update instructions

The problem can be corrected by updating your system to the following package versions:

Ubuntu 12.04

After a standard system update you need to reboot your computer to make
all the necessary changes.

ATTENTION: Due to an unavoidable ABI change the kernel updates have
been given a new version number, which requires you to recompile and
reinstall all third party kernel modules you might have installed. If
you use linux-restricted-modules, you have to update that package as
well to get modules which work with the new kernel version. Unless you
manually uninstalled the standard kernel metapackages (e.g. linux-generic,
linux-server, linux-powerpc), a standard system upgrade will automatically
perform this as well.

Related notices

  • USN-2285-1: linux-lts-quantal, linux-image-3.5.0-54-generic
  • USN-2287-1: linux-image-3.11.0-26-generic-lpae, linux-image-3.11.0-26-generic, linux-lts-saucy
  • USN-2286-1: linux-image-3.8.0-44-generic, linux-lts-raring
  • USN-2289-1: linux-image-3.11.0-26-generic-lpae, linux, linux-image-3.11.0-26-generic
  • USN-2284-1: linux-image-3.2.0-1451-omap4, linux-ti-omap4
  • USN-2288-1: linux-image-3.13.0-32-generic-lpae, linux-lts-trusty, linux-image-3.13.0-32-generic
  • USN-2290-1: linux-image-3.13.0-32-powerpc64-emb, linux-image-extra-3.13.0-32-generic, linux-image-3.13.0-32-generic, linux-image-3.13.0-32-generic-lpae, linux-image-3.13.0-32-powerpc64-smp, linux-image-3.13.0-32-powerpc-e500, linux-image-3.13.0-32-lowlatency, linux, linux-image-3.13.0-32-powerpc-smp, linux-image-3.13.0-32-powerpc-e500mc
  • USN-2281-1: linux-image-2.6.32-368-ec2, linux-ec2
  • USN-2282-1: linux-image-2.6.32-64-virtual, linux-image-2.6.32-64-sparc64, linux-image-2.6.32-64-preempt, linux-image-2.6.32-64-sparc64-smp, linux-image-2.6.32-64-powerpc64-smp, linux-image-2.6.32-64-generic, linux-image-2.6.32-64-lpia, linux-image-2.6.32-64-powerpc-smp, linux-image-2.6.32-64-server, linux-image-2.6.32-64-powerpc, linux-image-2.6.32-64-versatile, linux, linux-image-2.6.32-64-ia64, linux-image-2.6.32-64-generic-pae, linux-image-2.6.32-64-386